# Luavlna, version 0.1m, 2024-05-02 # Introduction `Luavlna` is a small package for plain LuaTeX and LuaLaTeX. In some languages, like Czech or Polish, there should be no single letter words at the line end, according to the typographical norms. There exists some external commands (like `vlna`) or packages (`encxvlna` for encTeX, `xevlna` for XeTeX, `impnattypo` for LuaLaTeX). Other feature of this package is including of non-breakable space after initials, like in personal names, after or before academic degrees and between numbers and units (SI and others). The code is modified version of Patrick Gundlach’s answer on TeX.sx[^1]. The difference is that it is possible to specify which single letters should be taken into account for different languages. The support for degrees and units was added as well. # Usage The usage is simple: \input ucode \uselanguage{czech} %% in the case of luacsplain, use instead: %% \chyph %% but language code for Czech is different than in LaTeX or normal %% LuaTeX, so you will need to set single letters with somethinh like: %% \singlechars{5}{AIiVvOoUuSsZzKk} \input luavlna \preventsingledebugon \input luaotfload.sty \font\hello={name:Linux Libertine O:+rlig;+clig;+liga;+tlig} at 12pt \hsize=3in \hello PÅ™ÃliÅ¡ žluÅ¥ouÄký kůň úpÄ›l Äábelské ódy. Text s krátkými souhláskami a samohláskami i dalÅ¡Ãmi jevy z nabÃdky možnostà (v textu možnými). I zaÄátek odstavce je tÅ™eba Å™eÅ¡it, i když výskyt zalomenà nenà pravdÄ›podobný. Co tÅ™eba à znaky Å¡ diakritikou? Různé možnosti [v závorkách <i jiných znacÃch Podpora iniciál a titulů: M. J. Hegel, Ing. BÄ›háková, Ph.D., Ž. ZÃbrt. Podpora jednotek: 100,5 MN\cdot{}s, 100.5 kJ, 200 µA, $-1$ dag, 12 MiB, 1 m$^3$/s. \preventsingledebugoff \bye It is also possible to use the package with lua, just use \usepackage{luavlna} in the preamble. # Commands \singlechars{language name}{letters} Enable this feature for certain letters in given language. Default values: %% only Czech and Slovak are supported out of the box \singlechars{czech}{AIiVvOoUuSsZzKk} \singlechars{slovak}{AIiVvOoUuSsZzKk} \compoundinitials{language name}{compounds} Declare compound letters for given language. Second argument should be comma separated list of compound letters, in exact form in which they can appear. Default values: \compoundinitials{czech}{Ch} ##Turning off language switching By default, language of the nodes is taken into account. If you want to use settings for one language for a whole document, you can use following command: \preventsinglelang{language name} ##Turning off processing If you want to stop processing of the spaces in the document you can use command \preventsingleoff To resume processing, use \preventsingleon ## Debugging commands \preventsingledebugon \preventsingledebugoff Insert debugging marks on/off. Default off. # Authors Michal Hoftich Miro HronÄok # License Permission is granted to copy, distribute and/or modify this software under the terms of the LaTeX Project Public License, version 1.3. [^1]: <http://tex.stackexchange.com/a/28128/2891>